SLAC, Menlo Park, California 94025, USA.
Phys Rev Lett. 2013 Aug 23;111(8):084802. doi: 10.1103/PhysRevLett.111.084802. Epub 2013 Aug 20.
Electron and stochastic cooling are proven methods for cooling low-energy hadron beams, but at present there is no way of cooling hadrons as they near the TeV scale. In the 1980s, Derbenev suggested that electron instabilities, such as free-electron lasers, could create collective space charge fields strong enough to correct the hadron energies. This Letter presents a variation on Derbenev's electron cooling scheme using the microbunching instability as the amplifier. The large bandwidth of the instability allows for faster cooling of high-density beams. A simple analytical model illustrates the cooling mechanism, and simulations show cooling rates for realistic parameters of the Large Hadron Collider.
电子和随机冷却技术已被证明可用于冷却低能强子束，但目前尚无方法可冷却接近 TeV 能标的强子。20 世纪 80 年代，Derbenev 曾提出利用自由电子激光等电子不稳定性可产生强集体空间电荷场，从而校正强子能量。本文提出了一种采用微束团不稳定性作为放大器的 Derbenev 电子冷却方案的变体。不稳定性的大带宽允许对高密度束进行更快的冷却。简单的解析模型说明了冷却机制，并且模拟结果表明了大型强子对撞机的实际参数的冷却速率。
